Saw mills



' (No Model.)

A. YARNALL.

4 BINDING ROLLER FOB, GANG SAW MILLS. No. 288,910.

Patented Nov. 20, 1883 N. zrcas mmummur, Wuhinglan. lav c,

UNITED STATES "PATENT FFICE.

ACE YARNALL, OF VILLIAMSPORT, PENNSYLVANIA.

BINDING-ROLLER FOR GANG-SAW MILLS.

SPECIFICATION forming part of Letters Patent No. 285,910, dated November20, 1888.

Application filed June 2, 1883. (No model.)

To all whom it may concern.-

Be it known that I, Acn YARXALL, of Williamsport, in the countyofLycoming and State of Pennsylvania, have invented a new and usefulImprovement in Binding-Rollers for GangSaw Mills; and I do herebydeclare that the following is a full and exact description of the same,reference being had to the accompanying drawings, and to the letters ofreference marked thereon.

The invention involved in the subject-matter of this application relatesto an improvement in binding-rollers for gang-saw mills, and has for itspurpose to provide such mills with rollers that shall at all times beself-adjusting, to thereby accommodate themselves to the variousthicknesses of stocks passing under them to the action of the saws.

It is the purpose, further, of this invention to compel the rollers, inadjusting themselves to the thicknesses of the stocks, to tightly bindthesame, without the aid of any power other than that attached to theweight of said rollers, and, further, to provide rollers whosearrangement in the mill shall economize both in the number of partsemployed and in the cost of the same.

To the accomplishment of the above the invention consists of a pair ofrollers mounted upon a shaft eccentrically journaled in a frame adaptedto vertical movement when the stocks are passed under the rollers; andit further consists in the construction and arrangement of the partsemployed in thus mounting the shaft and rollers, all as more fullyhereinafter described, and set forth in the claims.

For the better understanding of the invention, and to enable thoseskilled in its relative art to know how to construct and use the same,reference may be had to the accompanying drawings, in which- Figure 1represents a perspective view of the device with the binding-rollersremoved, and illustrating in dotted lines the position of therollersupporting frame when the logs or stocks are introduced, and Fig.2 a longitudinal section through the shaft, binding-rollers, and framesupporting the same.

Like letters of reference denote correspond ingpart-s in both figures.

The main frame-work of this device consists, preferably, of fouruprights, A, joined lengthwise at their upper and lower ends bycrossbeams A and transversely by beams A. In the lower cross-beams A aretransversely mounted the feed-rollers B B, one at the feed 4 end ofthe'machine and the other at the discharge end thereof.

The frame carrying the binding-rollers consists, preferably, of twouprights, O 0, arranged upon the main frame-work at points diametricallyopposite, and connected together by means of a transverse beam, D. Theends of these uprights, which are tenoned, each have vertical bearing ina rectangular slot, a, centrally located in each of the upper and lowercross-beams, A. The inner terminus of each tenon forms a seat, as shown,to limit the movement of this roller-carrying frame when the logs orstocks a1 e passed under the rollers, In each of the uprights O C, andat points diametrically opposite and beneath the beam D, connecting saiduprights, is firmly em bedded a cylindrical casing, E, in which looselyfits a disk, F, of the same axial diameter as said casings. In thesedisks are eccentrically and rigidly fixed the onterrends of a shaft, G,the inner ends of which are likewise fixed in a disk, H, vas shown inFig. 2, corresponding in every respect with those to which the outerends of said shaft are affixed. Upon this shaft G, and between thecenter and outer disks, are centrally mounted the binding-rollers I I,whose weight should be as heavy as the strength of the shaft willpermit. In in troducing to the action of the saws two stocks ofdifferent thicknesses, the upward pressure upon the rollers compels thesame to rise and simultaneously and automatically adjust themselves withan even pressure upon their respect ive stocks. Should circumstancesneed to feed two stocks of an equal thickness, the two rollers willreadily adjust themselves and bear with an even pressure thereon. Theserol1- ers maintain a steady bind, and are at all times sufficiently nearthe saws to resist any liftingpower that might ensue by the contact ofthe saw-teeth with the stocks.

From the foregoing it will be apparent that by the arrangement of thesebinding-rollers it will be impossible for any vibration to occur,

either at the front or rear end of the frame, and that if more weight isdesired or requisite any suitable means will prove effective byattaching the same to the side of each of the up rights carrying thebinding-rollers. I am aware of the existence of Patent No. 250,928, ofDecember 18, 1881, and therefore disclaim anything therein described orshown, but

VVhatI claim as new, and desire to secure by Letters Patent, is

1. A pair of bindingrollers mounted upon a shaft eccentrically journaledat each end in a circular disk, having loose bearings within acylindrical casing embedded in a frame adapted to automatically riseupon introduction of the logs to the rollers, and to likewise fall whenthey are discharged therefrom substantially as and for the purpose setforth.

2. In a machine of the character described,

. the frame for carrying the bindingrollers,

consisting of two connected uprights arranged at points diametricallyopposite upon the main frame, and provided each with tenoned ends, whichhave vertical and loose bearings 2 5 in rectangular slots located one ina crossbeam above each of said uprights, and in a cross-beam under thesame, substantially as and for the purpose set forth.

3. In a machine of the character described, the combination, with thetwo uprights O 0, arranged at points diametrically opposite upon themain frame, and having loose end bearings in slots in said frame, of thebindingrollers I I, mounted upon shaft G, eccentri- 5 cally journaled atits centerin the disk H, and likewise journaled at its outer ends in thedisks F F, the latter having loose bearings in two cylindrical casings,E E, embedded in the uprights O C, at points diametrically opposite,substantially as set forth.

In testimony whereof I affix my signature in presence of witnesses.

ACE YARNAIJL.

Vitnesses:

H. E. TAYLOR, R. G. MAYNARD, I. C. SAMPSON.

